Section 12.3

1. In the murders dataset, the region is a categorical variable and the following is its distribution. To the closest 5%, what proportion of the states are in the North Central region? 25% of states are in North Central region.

2. Which of the following is true?: B. The graph above shows only four numbers with a bar plot.

3. The plot below shows the eCDF for male heights: B. 95%.

4. To the closest inch, what height m has the property that 1/2 of the male students are taller than m and 1/2 are shorter? C. 69 inches.

5. Here is an eCDF of the murder rates across states: Knowing that there are 51 states (counting DC) and based on this plot, how many states have murder rates larger than 10 per 100,000 people? A. 1 state

6. Based on the eCDF above, which of the following statements are true: D. With the exception of 4 states, the murder rates are below 5 per 100,000.

7. Below is a histogram of male heights in our heights dataset: Based on this plot, how many males are between 63.5 and 65.5?

C. 34

8. About what percentage are shorter than 60 inches? A. 1%.

9. Based on the density plot below, about what proportion of US states have populations larger than 10 million? B. .15

10. Below are three density plots. Is it possible that they are from the same dataset?

D. They are the same dataset, but the first is not in the log scale, the second undersmoothes, and the third oversmoothes.